Originally Posted by rlj676

Well, I work at GM, have worked at Ford (so know people at both) and have friends in our R&D labs running dyno's all day every day, so I'm pretty sure I'm informed here. For mainstream applications, who is using a SC? Like I said, there are some high performance SC applications (which is where you come in right?), but for fuel consumption reasons turbos are where the development is for the biggest volume of the sales. So, I'm pointing out that turbos are far from being walked away from. You mention Ford, you have heard of ecoboost which they are planning to put in every vehicle right? This is what I mean. I'm all for hearing new supercharged programs Ford (or anyone) is coming out with? If they are, it's high performance, not a volume seller.

Anyone that has driven a modern turbo car (2.0 LNF Cobalt SS or Regal, BMW 335, Ecoboost Ford's) can promise you that lag is not only not noticeable, it is non-existent. I totally agree though it takes very complex electronics and tech (direct injection like I mentioned). This is why it isn't the short term performance boat solution, but the long term one. We as an industry can not invest what auto OEM's can to get the tech and make it affordable. Hence Merc Racing's obscene pricing.

Originally Posted by RunninHotRacing158

Jon thnx for sharing and Dr Bobs cougar is a Badd MoFo

Originally Posted by 55thunder

http://www.youtube.com/watch?v=jn7iT...ayer_embedded#!

Originally Posted by tomcat

I wasn't going to comment on this thread, because the choice of supercharger argument has been done many times on OSO. But I would like to say that the rumors of my disappearance are greatly exaggerated!

Since I'm here, I have to say that the problem is not which supercharger to use to make 1800 HP. The problem is how to keep the engine together at 1500 HP. I was told this years ago by a respected engine builder, but I didn't appreciate the fact until we spent a lot more time and money on the twin blower system. Then the light bulb went on. You just can't keep pushing more and more HP out of the same eight holes. Eventually you run into four major obstacles:

too much valve lift
too much piston speed
too much boost pressure, heat, drive loss etc.
too much cylinder pressure

As a result of this "revelation", we started working on our own engine program. This, of course, turned out to be a huge job and that's why you haven't heard from us for a while.

And although I don't post much anymore, I do enjoy poking my head up once in a whle to see what's happening on OSO.

Thanks,

Tom

Originally Posted by HaxbySpeed

Is that why people are taking PSI's off and replacing them with turbos.. Try making that statement to Brad Personett. Even the one on in my Avatar is being removed as we speak and getting turbos ready for the Supernationals in Vegas..

Originally Posted by CB-BLR

That is a really cool video... but that doesnt look like it is set up for a boat as it is running there. The header is glowing... which means non water jacketed exhaust (a must for marine use), and the motor doesn't look to have all accessories installed (raw water pump, power steering pump, alternator, dry sump pump etc.)

Dustin's 4.0 quad rotor motor is producing over 1850 hp while running all of the accesories mentioned above, through water jacketed exhaust.

I would like to see a marine performance turbo motor producing more than 1850 hp... while running all accessories for a boat... in marine configuration... please

Thanks,

Chris

P.S. If you guys can not come up with a marine performance turbo motor producing more than 1850 hp...while running all accessories for a boat...in marine configuration....then Dustin's title for this thread is pretty darn legitimate.

Originally Posted by BattleCry

Here you go Chris. Reliable information from named sources in the boating world. Nobody does turbo engines like Ken Duttweiler. Heck, a regular, infamous character of this forum, Sean Stinson, has driven the boat. I and everyone at last year's Shootout was there to witness it. When Dustin's engines get to 2500hp let the rest of us know!

http://www.offshoreonly.com/forums/g...u-go-here.html

Big Andy

Originally Posted by Whipple Charged

I can't post the programs, we sign ND agreements but many packages, such as the Ecoboost are facing problems and there are identical motors running PD SC's in testing right now. As the program directions are changing for 2016 zero emission standards which have been unachievable by OEM's and turbo applications to date. Turbo's have grown in popularity and will continue for the next few years, but the OE's are looking at the future and already testing both scenario's, and believe me, twin-screw's with variable pressure ratio's are in the future along with far more advanced clutch systems then used on the Mercedes applications.